Draft Urban Nutrient Management Recommendations. Presented to the Agricultural Workgroup November 29, 2012

Transcription

1 Draft Urban Nutrient Management Recommendations Presented to the Agricultural Workgroup November 29, 2012

2 Next Steps Solicit informal feedback today Revise draft of both panel reports Joint USWG/WTWG/Invited Interests meeting on December 17 (including ag) 30 day comment period Final Draft submitted for USWG/WTWG/WQGIT approval in early 2013

3 The Expert Panel Panelist Jonathan Champion Karl Berger Dr. Stu Schwartz William Keeling Dr. Gary Felton Dr. Neely Law Marc Aveni Dr. Mike Goatley Tom Schueler Affiliation District Department of the Environment Metropolitan Washington Council of Governments University of Maryland, Baltimore County Virginia Department of Conservation and Recreation University of Maryland, College Park Center for Watershed Protection Prince William County Department of Public Works Virginia Tech Chesapeake Stormwater Network (panel facilitator) Technical support by Jeremy Hanson (CRC), Molly Harrington (CRC), Gary Shenk (EPA CBPO, Jeff Sweeney (EPA CBPO) and Mark Sievers (TetraTech) is gratefully appreciated

4 Panel Charge Current CBWM land use data for urban pervious areas and recommend the most probable splits for turf management status (i.e., fertilized, un-fertilized, and over-fertilized) Available literature on the nutrient and sediment loading rates associated with fertilized, un-fertilized and over-fertilized turf, accounting for regional and terrain differences. Specific definitions for each class of UNM practices and the qualifying conditions and rationale under which a locality can receive a nutrient reduction credit. Whether the 2003 CBP-approved nutrient removal rates for UNM practices developed in 2003 is still reliable.

5 The Charge What, if any, nutrient credits can be provided by outreach campaigns to change homeowner fertilization behavior. The proper units to report UNM implementation to receive credit in the Chesapeake Bay Watershed Model Critically analyze any unintended consequence associated with the removal rates and any potential for double or over-counting of the load reduction achieved.

6 Definitions Pervious Land vs. Turf High Risk Export Factors Urban Nutrient Management Core UNM Practices P Fertilizer Restrictions UNM Planning Agency Qualifying UNM Plan Trained UNM Expert Passive, Active, and Alternative Outreach

7 High Risk Export Factors Pervious areas subject to one or more of the following risk factors: Currently over-fertilized beyond state or extension recommendations P-saturated soils as determined by a soil P test Newly established turf (i.e., less than three years old) Steep slopes Exposed soil High water table Over-irrigated lawns Soils that are sandy, shallow, compacted or have low water holding capacity High use areas (e.g., athletic fields, golf courses) Adjacent to stream, river or Bay Karst terrain More specific operational definitions provided for each risk factor

8 Core UNM Practices for the Chesapeake Bay 1. Get technical assistance to develop an effective UNM plan for the property 2. Maintain a dense vegetative cover of turf grass or conservation landscaping 3. Choose not to fertilize, OR adopt a reduce rate/monitor approach OR the use the small fertilizer dose approach 4. Retain clippings and mulched leaves on the yard and keep them out of streets and storm drains 5. Do not apply fertilizer before spring green up or after Halloween*

9 Core UNM Practices for the Chesapeake Bay 6. Maximize use of slow release N fertilizer during the active growing season 7. Set mower height at 3 inches or taller 8. Immediately sweep off any fertilizer that lands on a paved surface 9. Do not apply fertilizer within 20 feet of a water feature and manage this zone as a perennial planting, a tall grass buffer or a forested buffer 10. Employ lawn practices to increase soil porosity and infiltration capability and use the lawn to treat stormwater runoff.

10 Review of Turf and Fertilization in the Chesapeake Bay Estimates of turf/pervious cover in watershed. Differences in State P fertilizer legislation Trends in non-farm fertilizer sales Derivation of existing CBP rate CBWM simulation of nutrients on pervious land

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12 Comparison of Acres of Urban Pervious Areas and Anticipated Acres Under Urban Nutrient Management by 2025, For Each Bay State Urban Pervious Area 1 Urban Nutrient Management 2 Acres State Delaware 36,481 34,584 District of Columbia 17,206 42,240 Maryland 990, ,575 New York 170, ,654 Pennsylvania 1,052, ,154 Virginia 1,195, ,058 West Virginia 88, TOTAL 3,551,037 1,631,612 1 Acres of Urban Pervious Area in Version of Chesapeake Bay Watershed Model 2 Acres under urban nutrient management in each state by 2025 as reported in the Phase 2 Watershed Implementation Plan submissions to EPA in 2012, as summarized in spreadsheet by Jeff Sweeney, EPA CBPO 3

13 State P fertilizer legislation 3 States have done so (MD,NY, VA) Each legislation is different, and is not equivalent to a P-ban in fertilizer products States that not passed laws still benefit form industry phase-out of fertilizer products

14 The Panel and the Old CBP-Approved UNM Rate... urban nutrient management leads to a reduction in urban fertilizer applied. Urban nutrient management involves public education (targeting urban/suburban residents and business) to encourage reduction of excessive fertilizer use. The CBP Nutrient Subcommittee Tributary Strategy Workgroup has estimated that urban nutrient management reduces nitrogen loads by 17% and phosphorus loads by 22% No scientific or modeling analysis could be found to support or document the above cited rates. UNM definition was extremely ambiguous and could not be accurately measured, tracked or verified. Panel concluded the existing CBP-approved UNM practice could not be technically justified.

15 Non-farm fertilizer sales statistics show trends but have some real data quality issues

16 Industry Reported Change in P Fertilizer Sales in the Bay States, 2006 to State Percent Millions of Millions of reduction Pounds Pounds Pennsylvania % Maryland % Virginia % Delaware % West Virginia % Total % 1 annual sales data reported by Scotts (2011) for non-farm fertilizer sales by state. Scott's currently has a 60% market share, and has committed to a full phase out of P in its fertilizer products by January 1, Analysis performed by Gary Felton, Note that the statistics on P sales are provided for each state as a whole, and NOT the fraction of the state located within the Bay watershed

17 Urban Nutrient Research Review 1. P Dynamics on Urban Lawns 2. N Dynamics on Urban Lawns 3. High Risk Factors for Nutrient Export 4. Justification for Core UNM Practices 5. Impact of P Fertilizer Restrictions 6. Homeowner Fertilizer Behavior 7. Effect of Outreach on Fertilizer Behavior Panel reviewed more than 150 papers and has met 7 times

18 Recommended Credits Automatic State-wide P Reduction Credit for UNM Legislation Contingent State-wide N Reduction Credit based on Sales N and P Reductions for Qualifying UNM Plans Programmatic Credit for Alternative Outreach Option

19 Automatic TP Load Reduction Credit from Pervious Lands for States that HAVE adopted urban nutrient management legislation Bay State TP Reduction (million pounds) % Change in Pervious Load % Change in Urban Load MD NY PA VA Delivered Loads 2 PA UNM legislation is still under consideration, no credit is allowed until it has passed Source: Gary Shenk, CBPO, April 10, 2012 spreadsheet of CBWM model runs assuming 0% P application rates Assumed 70% Reduction in TP fertilizer Inputs to CBWM

20 Automatic P Reduction Credit from Pervious Lands in States that influenced by fertilizer industry phase-out Bay State TP Reduction (million pounds) % Change in Pervious Load % Change in Urban Load DE DC PA WV Delivered Loads 2 In the event UNM legislation is not passed Source: Gary Shenk, CBPO, April 10, 2012 spreadsheet of CBWM model runs assuming 0% P application rates Assumed 60% Reduction in TP fertilizer Inputs to CBWM

21 Meaningless Photo to Break up Monotonous Word Slides

22 Statewide Nitrogen Reduction Credit for Pervious Land Load reduction credit contingent on the expected decline in N fertilizer sales over time. Credit is based on each state's 2014 N fertilizer inputs, relative to the current CBWM assumption of 43 lbs/ac/year for pervious land. Only granted when states can document a downward trend in the N content of non-farm fertilizer sales data. The magnitude of the credit will be determined by changing N fertilization inputs in the CBWM. Subject to biannual verification

23 Pervious Urban Delivered load % drop 3% Decline in N Load for each 10% decline in N fertilizer sales 16% 14% 12% 10% 8% 6% 4% 2% 0% 10% 20% 30% 40% 50% 2009N scenario % drop in N urban fertilizer input

24 Nitrogen Reduction Credits for Qualifying UNM Plans Per Acre of Residential, Commercial, Institutional or Public Land Turf Nitrogen Management Category Low Risk Lawns 1 Hi Risk Lawns 1 Blended Rate 2 Annual Nitrogen Reduction Rate 6 % reduction of pervious load 20% reduction of pervious load 9% reduction of pervious load 1 regardless of fertilization regime (including non-fertilized lawns 2 state-wide credit, assuming 80% of lawn acreage falls into the low category and 20% is high risk While rates were based on best professional judgment, they are reinforced by a CBWM loading mass balance analysis

25 Phosphorus Reduction Credits for Qualifying UNM Plans Per Acre of Residential, Commercial, Institutional or Public Land Turf Management Category 1 Annual TP Reduction Rate 1 Low Risk Lawns Hi Risk Lawns Blended Rate 3 % reduction of pervious load 10 % reduction of pervious load 4.5% reduction of pervious land 1 regardless of fertilization regime (including non-fertilized lawns 2 state-wide credit, assuming 80% of lawn acreage falls into the low category and 20% is high risk

26 Alternative Outreach Option Communities can create programs that motivate property owners to implement the core UNM practices, such as: Local or regional social media/marketing campaigns to deliver the core message to a geographically defined target population, and funnel them to a UNM planning agency. Mapping of high risk export factors within a community to target outreach efforts to develop more UNM plans. Targeted training to commercial applicators, lawn care companies, landscape contractors and property managers. Distribution of point of sale outreach materials at retail sales outlets (e.g., information kiosks at home and garden stores) Other alternative outreach efforts, as approved by state and/or extension service.

27 Credit for Alternative Outreach Option Communities that utilize them are eligible for a one-time, three year N reduction credit equivalent to 3% of the N load generated from the total pervious land area in the geographical area that is targeted. Credit is contingent upon before and after surveys, monitoring or other research that can scientifically evaluate the quantitative outcome of the outreach program, in terms of actual changes in fertilization behavior or increased delivery of UNM plans. After the three years, the alternative outreach program credit will expire, and the acreage of UNM plans/pledges will become the metric by which credit is determined Acknowledged that some alternative outreach efforts may fail or may not meet their original expectations, but new data collected will improve future UNM delivery.

28 Accountability Different for each credit, although all must meet specific reporting, tracking and verification requirements

29 After 2015, however, the automatic state credit will lapse and be replaced with state-reported estimates of P fertilizer applications to pervious land using the methods and verification procedures Step 1: Multiply the state acreage in pervious land by the 1.3 lbs P/acre/year average application rate assumed in the current version of CBWM to establish the state P application benchmark. Step 2: Determine the P content of reported non-farm fertilizer sales for two consecutive years, accounting for the differential P content in the various lawn and garden fertilizer products that are represented in the sales statistics. Convert to total pounds of P, and adjust downward to account for non-bay watershed area in the state on a pro-rata basis. The mass of estimated P sold is then divided by the state acres of pervious land determine the new state average P application rate in lbs/ac/year

30 Step 3: Divide the new state P application rate by the state application benchmark and then multiply by 100 to get the percentage reduction in P application from the CBWM benchmark. Step 4: The state-specific unit area P application rate is then entered into the CBWM directly to compute the revised P load generated from pervious lands for the state. The Panel acknowledges that most current state nonfarm fertilizer sales statistics are not detailed enough to characterize urban nutrient content, but feel that such data is critical to verify the substantial reductions provided.

31 Qualifying Conditions for UNM Each UNM plan must be prepared by a trained expert (e.g., certified plan writer) Plan must be consistent with the applicable UNM core lawn care practices or existing state requirements (e.g., Virginia) Each UNM plan must clearly document the: Start and end dates for the plan Name, contact information and locator data for the owner, applicator and UNM planner Acreage of turf and landscaping covered by the plan Annual N and P fertilization rate Whether the turf is classified as high or low risk of nutrient export or is an unfertilized lawn (optional)

32 Q & A

33 Recommendations of the Expert Panel to Define Removal Rates for Individual Stream Restoration Projects DRAFT

34 Expert Panel on Urban Stream Restoration Panelist Affiliation Deb Cappuccitti Maryland Department of Environment Bob Kerr Kerr Environmental Services (VA) Matthew Meyers, PE Fairfax County (VA) Dept of Public Works and Environmental Services Daniel E. Medina, PE Atkins (MD) Joe Berg Biohabitats (MD) Lisa Fraley-McNeal Center for Watershed Protection (MD) Steve Stewart Baltimore County Dept of Env. Protection and Sustainability (MD) Dave Goerman Pennsylvania Department of Environmental Protection Natalie Hartman West Virginia Department of Environmental Protection Josh Burch District Department of Environment Dr. Robert C. Walter Franklin and Marshall College Dr. Sujay Kaushal University of Maryland Dr. Solange Filoso University of Maryland Julie Winters US Environmental Protection Agency CBPO Bettina Sullivan Virginia Department of Environmental Quality Panel Support Tom Schueler Bill Stack Chesapeake Stormwater Network (facilitator) Center for Watershed Protection (co-facilitator) Other Panel Support: Russ Dudley Tetra Tech, Debra Hopkins Fish and Wildlife Service, Molly Harrington, CBP CRC, Norm Goulet, Chair Urban Stormwater Work Group, Gary Shenk, EPA CBPO, Jeff Sweeney, EPA CBPO

35 Stream Restoration is expected to increase substantially to meet the WIP targets Urban Stream Restoration Expected by 2025 in Bay State Phase 2 Watershed Implementation Plans Urban Stream Restoration Non-Urban Stream Restoration Linear Feet (Miles) State Delaware 200 (0.02) 63,202 (12) District of Columbia 42,240 (8) 0 Maryland 19,354,449 (3666) 73,975 (14) New York 26,500 (5) 337,999 (64) Pennsylvania 55,000 (10) 529,435 (100) Virginia 116,399 (22) 104,528 (20) West Virginia 0 19,618 (3.7) TOTAL 3711 miles 214 miles 1 Acres under urban and non urban stream restoration in each state by 2025 as reported in the Phase 2 Watershed Implementation Plan submissions to EPA in 2012, as summarized in May and July 2012 spreadsheets provided by Jeff Sweeney, EPA CBPO

36 Initial CBP-Approved Stream Restoration Credit (2003) Removal Rate per Linear foot (lf) of Qualifying Stream Restoration Source TN TP TSS Spring Branch N= lbs lbs AT SOME POINT, APPLIED TO NON-URBAN STREAM RESTORATION PROJECTS Revised Removal Rate per Linear foot (lf) for Spring Branch, Based on Four Additional Years of Sampling and Data Re-Analysis Source TN TP TSS Spring Branch N= lbs lbs 1 % Removal in 42% 43% 83% Reach Source: Stewart et al (2008) and Steve Stewart presentation to expert panel 1/25/ the project did not directly measure nutrient and sediment removal due to prevented streambank erosion, so these numbers are still considered very conservative

37 2012 Interim Approved Removal Rate Interim Approved removal rate per Linear foot of Qualifying Stream Restoration Source TN TP TSS New Interim 0.20 lbs lbs 310 lbs CBP Rate Derived from six stream restoration monitoring studies: Spring Branch, Stony Run, Powder Mill Branch, Moore s Run, Beaver Run and Beaver Dam Creek located in MD or PA 100,000 10,000 Erosion Rate (lb/ft/yr) 1,

38 Categories of Stream Restoration Natural Channel Design (e.g., Rosgen approach) Regenerative Stormwater Conveyance (wet and dry channel) Legacy Sediment Removal (PA) Others Panel agnostic as to which approach is superior, but devised four project specific protocols based on project design factors

39 Stream Restoration Credits Prevented Bank Erosion Instream denitrification Stormflow Reconnection to Floodplain

40 3 Stream Restoration Protocols Protocol 1: Credit for Prevented Sediment During Storm Flow -- This protocol provides an annual mass nutrient and sediment reduction credit for qualifying stream restoration practices that prevent channel or bank erosion that would otherwise be delivered downstream from an actively enlarging or incising urban stream. 100,000 10,000 Erosion Rate (lb/ft/yr) 1,

41 Stream Restoration Protocols Protocol 2: Credit for Denitrification in the Hyporheic Zone During Base Flow -- This protocol provides an annual mass nitrogen reduction credit for qualifying projects using empirical measurements of denitrification during base flow within a stream's hyporheic zone (stream, riparian and floodplain)

42 Stream Restoration Protocols Protocol 3: Credit for Floodplain Reconnection Volumes During Storm Flow Annual mass nutrient reduction credit for projects that reconnect stream channels to their floodplain over a wide range of storm events

43 Issues with Applying Urban Protocols to Non-Urban Stream Restoration Projects Urban and non-urban streams do differ with respect to their hydrologic stressors, nutrient loadings and geomorphic response. Both are subject to the pervasive impact of legacy sediments observed in rural and agricultural watersheds The new urban stream protocols should work well in rural situations, depending on project design parameters (e.g., severity of bank erosion, floodplain reconnection volume, etc.)

44 Panel recommends that the urban protocols can be applied to non-urban stream restoration projects, if they: Are designed using the NCD, LSR or RSC approaches, Meet the relevant qualifying conditions, environmental review and verification requirements for urban projects. Are adjusted to reflect the actual non-urban load being delivered to the rural project * *The appropriate unit area loading rate for each non-urban land use can be directly determined directly from local CAST outputs for the geographic area in which the project is located.

45 Some kinds of non-urban stream restoration projects will not qualify for sediment or nutrient credit including: Enhancement projects where the stream is in fair to good condition, but habitat features are added to increase fish production (e.g., trout stream habitat, brook trout restoration, removal of fish barriers, etc.). Projects that seek to restore streams damaged by acid mine drainage Riparian fencing projects to keep livestock out of streams Stream mitigation projects

46 Q & A